I just want to share a little discovery I made quite a few weeks ago that now has been tested on many occasions and I think I can stand behind this concoction with regards to its function and quality. This is perhaps already widely know and if so I'm sorry for posting something obvious, but it's been working wonders for me since I discovered it and I thought I'd share. Whilst trying to fix both wonky kits and touching up my premium Takom King Tiger with interior there's always going to be some details that needs attention from Mr. Putty. I think this is inevitable... Using Tamiya basic putty (the white stuff) is a rather messy ordeal and it's sometimes hard to get into seams and small cracks without making a mess so I started experimenting with various methods of thinning it. To make a long story short this is where I discovered that Tamiya Putty became something very different when mixed with Tamiya extra thin cement! Not only did it flow perfectly into those small cracks and seams - it dried very fast, and when dried I think it's actually become harder than when used on its own! (This might be an illusion on my part but it certainly sands better.) So what I did was to take a jar of the cement where only ~20% was left and I added almost a half of a tube of putty into it and stirred. Now I have liquid cement at hand all the time, just shake before use and that's it! If you want slightly thicker stuff just add more putty to your like. The built in brush was obviously something I wanted as a built in applicator and it works great. No more mess, faster drying and fantastic when you want to fill tiny cracks/seams! Depending on how thin you make the liquid putty there's going to be some shrinkage when drying, but this isn't necessarily a bad thing, and since it dries in just a few minutes another thin layer can be applied where needed until you're satisfied. My intention was not to have something to build up large blobs but to have something that could easily fix seams and similar minor blemishes and this works fantastically well for me! A bonus is that it bites in to the plastic really well due to the MEK (i.e. methyl ethyl ketone, Tamiya cement) it's thinned with. I hope this could be of use to anyone else who'd like to have a liquid putty and have yet to discover this!